Confidence intervals for proportions

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Let's assume the municipality would take a sample of $23$ to check for types of green roofs and also the distribution of the roofs over the different city districts. Simulate this situation by taking a simple random sample of size $23$ from D, use seed $9$ by running the command set.seed(9) before taking the sample.

Estimate the fraction of green roofs that are of the type 'Sedumdak' and calculate the $85\%$ confidence interval around this estimate. Round your answers to three decimal points.

Fraction of green roofs of type Sedumdak =

Lower bound $85\%$ confidence interval =

Upper bound $85\%$ confidence interval =

6. Parameter Estimation and Confidence Intervals: Practical 6

Confidence intervals for proportions